During the Song Dynasty, Beidi rebelled and the border was in crisis. Young general Li Yanrong was ordered to take command and go on an expedition. He rode on the battlefield and made great achievements in battle. However, the war has not yet been extinguished, and undercurrents have arisen in the court, with traitors in power and slanderous words deceiving the Lord. Li Shou, the Minister of War, who is also the father of Li Yanrong, was framed for "collaboration with the enemy and the country." As soon as the imperial edict was issued, the Li family mansion was overturned in an instant, and the young and old were displaced. The former glory turned into a bloody storm overnight. The second son, Li Yangui, with filial piety in mind, went to Suzhou with his old mother to seek refuge with his father-in-law Huang Zhang. However, he received a cold look and regretted the engagement. His former in-laws instantly turned against him and regarded him as an abandoned child. In desperation, Li Yangui had no choice but to carry water and work as a slave to serve his mother, enduring the harshness of the world and the cold eyes of the world with his humble body. His fiancée Huang Guiying was deeply in love and secretly helped each other, and the maid Yunxiang even risked her life to protect her. However, she was eventually murdered and framed to death. All the crimes were placed on Li Yangui. The Suzhou magistrate was corrupt and perverted the law, accepted bribes, and hastily convicted him. He was sentenced to death and placed in death row to be executed in the future. When his life was hanging by a thread, Ai Qian, a righteous man in the world, was so angry that he rode on a flaming horse, traveling thousands of miles day and night, to report the news. When the news reached the border, Li Yanrong was furious when he heard that his brother had been wronged, so he led a million-strong army back to the court in blood, marched to the city, and shocked Chang'an. On the execution ground, the drums were beating loudly, the blade was hanging high, Li Yangui's life was like a thread, life and death were only a matter of seconds. At this moment, the war horses neighed and the iron cavalry surged. Li Yanrong came in with strong swords and an angry shout. He raised his sword and robbed the court, killed the evildoer, saved his brother, and washed away the injustice with blood. Under the white sky, the iron-blooded brothers stand side by side, their father's hatred is over.
